Shared MailBox

Read Permission to the Shared Mailbox Office 365

Connect via powershel with the account that had given read access

Get-MailboxFolder –Identity director@domain.com –recuse | Add-MailboxFolderPermission –user secretariat@domain.com –AccessRights Reviewer

Now let’s remove the permission to send on behalf of

Set-Mailbox –Identity director@domain.com –GrantSendOnBehalfto $null

Now add the email account in Microsoft Outlook:
File | Account Settings | Double click on account | More Settings | Advanced | Mailbox | Add | Enter the name of the Mailbox. OK an all screens.

Done.